首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2908篇
  免费   422篇
  国内免费   11篇
耳鼻咽喉   4篇
儿科学   88篇
妇产科学   329篇
基础医学   193篇
口腔科学   35篇
临床医学   1139篇
内科学   332篇
皮肤病学   65篇
神经病学   102篇
特种医学   281篇
外科学   184篇
综合类   75篇
一般理论   4篇
预防医学   253篇
眼科学   12篇
药学   131篇
中国医学   1篇
肿瘤学   113篇
  2023年   46篇
  2022年   10篇
  2021年   20篇
  2020年   44篇
  2019年   30篇
  2018年   84篇
  2017年   103篇
  2016年   89篇
  2015年   121篇
  2014年   129篇
  2013年   132篇
  2012年   76篇
  2011年   104篇
  2010年   132篇
  2009年   122篇
  2008年   87篇
  2007年   111篇
  2006年   83篇
  2005年   69篇
  2004年   63篇
  2003年   78篇
  2002年   65篇
  2001年   89篇
  2000年   62篇
  1999年   86篇
  1998年   114篇
  1997年   124篇
  1996年   129篇
  1995年   115篇
  1994年   74篇
  1993年   57篇
  1992年   65篇
  1991年   57篇
  1990年   38篇
  1989年   61篇
  1988年   52篇
  1987年   40篇
  1986年   43篇
  1985年   48篇
  1984年   37篇
  1983年   28篇
  1982年   28篇
  1981年   17篇
  1980年   19篇
  1979年   17篇
  1978年   21篇
  1977年   22篇
  1976年   22篇
  1975年   21篇
  1973年   11篇
排序方式: 共有3341条查询结果,搜索用时 0 毫秒
81.
Objectives. This study examined the psychometric properties of the Multidimensional Fatigue Symptom Inventory-Short Form (MFSI-SF) in a community-based sample of African-Americans.

Design. A sample of 340 African-Americans (116 men, 224 women) ranging in age from 18–81 years were recruited from the community (e.g., churches, health fairs, and beauty salons). Participants completed a brief demographic survey, the MFSI-SF and the Positive and Negative Affect Schedule.

Results. The structural validity of the MFSI-SF for a community-based sample of African-Americans was not supported. The five dimensions of fatigue (General, Emotional, Physical, Mental, Vigor) found for Whites in prior research were not found for African-Americans in this study. Instead, fatigue, while multidimensional for African-Americans, was best represented by a unique four-four profile in which general and emotional fatigue are collapsed into a single dimension and physical fatigue, mental fatigue, and vigor are relatively distinct. Hence, in the absence of modifications, the MFSI-SF cannot be considered to be structurally invariant across ethnic groups. A modified four-factor version of the MFSI-SF exhibited excellent internal consistency reliability and evidence supports its convergent validity. Using the modified four-factor version, gender, and age were not meaningfully associated with MFSI-SF scores.

Conclusion. Future research should further examine whether modifications to the MFSI-SF would, as the findings suggest, improve its validity as a measure of multidimensional fatigue in African-Americans.  相似文献   

82.
Traumatic injury is the leading cause of potentially preventable lost years of life in the Western world and exsanguination is the most potentially preventable cause of post-traumatic death. With mature trauma systems and experienced trauma centres, extra-abdominal sites, such as the pelvis, constitute the most frequent anatomic site of exsanguination. Haemorrhage control for such bleeding often requires surgical adjuncts most notably interventional radiology (IR). With the usual paradigm of surgery conducted within an operating room and IR procedures within distant angiography suites, responsible clinicians are faced with making difficult decisions regarding where to transport the most physiologically unstable patients for haemorrhage control. If such a critical patient is transported to the wrong suite, they may die unnecessarily despite having potentially salvageable injuries. Thus, it seems only logical that the resuscitative operating room of the future would have IR capabilities making it the obvious geographic destination for critically unstable patients, especially those who are exsanguinating.  相似文献   
83.

Background

Social connection is a fundamental human need. Its absence can lead to loneliness and social isolation, adversely impacting health and well-being. Given their regular contact and trusted relationships with older people, practitioners delivering community-based primary care are well-positioned to address this issue. However, their contribution to addressing loneliness and social isolation is unclear.

Aim

This integrative review explores the contribution of the primary care workforce to interventions aimed at reducing loneliness and social isolation in community-dwelling older people.

Method

Using an integrative review method, Scopus, Web of Science, CINAHL and PubMed were searched for original research published between 2000 and 2022. Fourteen papers reporting 13 primary studies were appraised for methodological quality and included in the review. Data were extracted into a summary table and analysed using thematic analysis.

Results

Included studies came from over six countries. Internationally, primary care services have diverse structures, funding and workforces influencing their response to loneliness and social isolation. All but one intervention was multi-component, with ten studies including a group-based activity and three providing primarily individual-level activities. Only six studies reported reductions in loneliness following the intervention. Three themes were identified: characteristics of interventions; implementation context, barriers and facilitators; and differing contributions of primary care practitioners in addressing loneliness and social isolation of older people.

Conclusion

There is increasing demand and scope for primary care practitioners to assist lonely and socially isolated older people. It is important to understand how to equip and incentivise these practitioners to routinely identify, assess and respond to lonely and socially isolated older people despite varying implementation contexts. There is a need for further research that explores how the primary care team can be better utilised to deliver effective interventions that reduce the health impacts of loneliness and social isolation.  相似文献   
84.
85.
86.
87.
88.
89.
At the 2013 Academic Emergency Medicine global health consensus conference, a breakout session to develop a research agenda for resuscitation was held. Two articles are the result of that discussion. This second article addresses data collection, management, and analysis and regionalization of postresuscitation care, resuscitation programs, and research examples around the world and proposes a strategy to strengthen resuscitation research globally. There is a need for reliable global statistics on resuscitation, international standardization of data, and development of an electronic standard for reporting data. Regionalization of postresuscitation care is a priority area for future research. Large resuscitation clinical research networks are feasible and can give valuable data for improvement of service and outcomes. Low‐cost models of population‐based research, and emphasis on interventional and implementation studies that assess the clinical effects of programs and interventions, are needed to determine the most cost‐effective strategies to improve outcomes. The global challenge is how to adapt research findings to a developing world situation to have an effect internationally.  相似文献   
90.
Fifty years ago this summer, the Uniform Anatomical Gift Act was adopted by the National Conference of Commissioners on Uniform State Laws and approved by the American Bar Association. The UAGA has provided a sound and stable legal platform on which to base an effective nationwide organ donation system. The cardinal principles of altruism, autonomy, and public trust are still important. At a time when confidence and trust in our government and many private institutions has declined, maintaining trust and confidence in our health care system and its commitment to “first, do no harm” has never been more important. Any policies that override these core ethical principles could cause irreparable damage to the public's faith in our transplant system. While progress has been made to increase organ registration and the number of organs transplanted, much more must be done to realize the potential of life‐saving therapy without jeopardizing ethical principles.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号